FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Gene: Dmel\ATP8A
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General Information
Symbol
Dmel\ATP8A
Species
D. melanogaster
Name
ATPase 8A
Annotation Symbol
CG42321
Feature Type
FlyBase ID
FBgn0259221
Gene Model Status
Stock Availability
Enzyme Name (EC)
P-type phospholipid transporter (7.6.2.1)
Gene Summary
Contribute a Gene Snapshot for this gene.
Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
2-68
RefSeq locus
NT_033778 REGION:13414978..13439051
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (10 terms)
Molecular Function (5 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (5 terms)
CV Term
Evidence
References
enables ATP binding
inferred from electronic annotation with InterPro:IPR001757, InterPro:IPR006539
inferred from electronic annotation with InterPro:IPR001757
inferred from biological aspect of ancestor with PANTHER:PTN000642368
inferred from sequence or structural similarity with SGD:S000000024
inferred from electronic annotation with InterPro:IPR006539
inferred from electronic annotation with InterPro:IPR006539
inferred from electronic annotation with InterPro:IPR023299
Biological Process (2 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
inferred from sequence or structural similarity with SGD:S000000024
inferred from biological aspect of ancestor with PANTHER:PTN000642368
inferred from electronic annotation with InterPro:IPR006539
Cellular Component (3 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (3 terms)
CV Term
Evidence
References
located_in membrane
inferred from sequence model
inferred from electronic annotation with InterPro:IPR001757, InterPro:IPR006539
is_active_in plasma membrane
inferred from biological aspect of ancestor with PANTHER:PTN000642368
is_active_in trans-Golgi network
inferred from biological aspect of ancestor with PANTHER:PTN008394225
Gene Group (FlyBase)
Protein Family (UniProt)
-
Catalytic Activity (EC/Rhea)
ATPase-coupled intramembrane lipid transporter activity
ATP + H2O + phospholipidSide 1 = ADP + phosphate + phospholipidSide 2 (7.6.2.1)
ATP hydrolysis activity
RHEA 13065:
Summaries
Gene Group (FlyBase)
PHOSPHOLIPID TRANSPORTING ATPASES -
The phospholipid transporting type IV P-ATPases are flippases that translocate phospholipids against concentration gradient from one side of a membrane to the other. This lipid shuttling forms new membrane structures, in particular vesicles. (Adapted from PMID:18439418 and PMID:26240149).
Gene Model and Products
Number of Transcripts
14
Number of Unique Polypeptides
12

Please see the JBrowse view of Dmel\ATP8A for information on other features

To submit a correction to a gene model please use the Contact FlyBase form

Protein Domains (via Pfam)
Isoform displayed:
Pfam protein domains
InterPro name
classification
start
end
Protein Domains (via SMART)
Isoform displayed:
SMART protein domains
InterPro name
classification
start
end
Structure
Protein 3D structure   (Predicted by AlphaFold)   (AlphaFold entry B7YZF8)

If you don't see a structure in the viewer, refresh your browser.
Model Confidence:
  • Very high (pLDDT > 90)
  • Confident (90 > pLDDT > 70)
  • Low (70 > pLDDT > 50)
  • Very low (pLDDT < 50)

AlphaFold produces a per-residue confidence score (pLDDT) between 0 and 100. Some regions with low pLDDT may be unstructured in isolation.

Experimentally Determined Structures
Crossreferences
Comments on Gene Model

Annotated transcripts do not represent all possible combinations of alternative exons and/or alternative promoters.

Annotated transcripts do not represent all supported alternative splices within 5' UTR.

Low-frequency RNA-Seq exon junction(s) not annotated.

Gene model reviewed during 5.49

A non-AUG start codon may be used for translation of one or more transcripts of this gene; based on the presence of conserved protein signatures within the 5' UTR without an in-frame AUG (FBrf0243886).

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0299754
4365
1150
FBtr0299755
5273
1324
FBtr0299757
5566
1350
FBtr0299756
4974
1216
FBtr0299758
4655
1095
FBtr0299759
4658
1176
FBtr0299760
4552
1091
FBtr0299761
4261
1150
FBtr0299762
4553
1275
FBtr0299763
4787
1275
FBtr0299764
5080
1301
FBtr0299765
5460
1265
FBtr0303100
4930
1082
FBtr0306698
3980
1127
Additional Transcript Data and Comments
Reported size (kB)
Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
UniProt
RefSeq ID
GenBank
FBpp0289032
130.9
1150
6.09
FBpp0289033
149.6
1324
6.76
FBpp0289035
152.4
1350
7.04
FBpp0289034
137.5
1216
7.26
FBpp0289036
124.7
1095
6.17
FBpp0289037
133.7
1176
6.51
FBpp0289038
124.3
1091
6.11
FBpp0289039
130.9
1150
6.09
FBpp0289040
144.1
1275
7.18
FBpp0289041
144.1
1275
7.18
FBpp0289042
146.9
1301
7.53
FBpp0289043
143.0
1265
6.80
Polypeptides with Identical Sequences

The group(s) of polypeptides indicated below share identical sequence to each other.

1150 aa isoforms: ATP8A-PE, ATP8A-PM
1275 aa isoforms: ATP8A-PN, ATP8A-PO
Additional Polypeptide Data and Comments
Reported size (kDa)
Comments
External Data
Linkouts
Sequences Consistent with the Gene Model
Mapped Features

Click to get a list of regulatory features (enhancers, TFBS, etc.) and gene disruptions (point mutations, indels, etc.) within or overlapping Dmel\ATP8A using the Feature Mapper tool.

External Data
Crossreferences
Eukaryotic Promoter Database - A collection of databases of experimentally validated promoters for selected model organisms.
Linkouts
Expression Data
Testis-specificity index

The testis specificity index was calculated from modENCODE tissue expression data by Vedelek et al., 2018 to indicate the degree of testis enrichment compared to other tissues. Scores range from -2.52 (underrepresented) to 5.2 (very high testis bias).

1.56

Transcript Expression
Polypeptide Expression
mass spectroscopy
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data
Marker for
 
Subcellular Localization
CV Term
Evidence
References
Expression Deduced from Reporters
High-Throughput Expression Data
Associated Tools

JBrowse - Visual display of RNA-Seq signals

View Dmel\ATP8A in JBrowse
RNA-Seq by Region - Search RNA-Seq expression levels by exon or genomic region
Reference
See Gelbart and Emmert, 2013 for analysis details and data files for all genes.
Developmental Proteome: Life Cycle
Developmental Proteome: Embryogenesis
External Data and Images
Linkouts
BDGP expression data - Patterns of gene expression in Drosophila embryogenesis
DRscDB - A single-cell RNA-seq resource for data mining and data comparison across species
EMBL-EBI Single Cell Expression Atlas - Single cell expression across species
FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
FlyAtlas2 - A Drosophila melanogaster expression atlas with RNA-Seq, miRNA-Seq and sex-specific data
Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
Flygut - An atlas of the Drosophila adult midgut
Images
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 20 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 10 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of ATP8A
Transgenic constructs containing regulatory region of ATP8A
Aberrations (Deficiencies and Duplications) ( 1 )
Inferred from experimentation ( 1 )
Gene partially disrupted in
Inferred from location ( 5 )
Variants
Variant Molecular Consequences
Alleles Representing Disease-Implicated Variants
Phenotypes
Orthologs
Human Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Homo sapiens (Human) (14)
13 of 14
Yes
Yes
12 of 14
No
Yes
7 of 14
No
No
7 of 14
No
No
1  
6 of 14
No
No
6 of 14
No
No
5 of 14
No
No
1  
5 of 14
No
No
5 of 14
No
No
4 of 14
No
No
4 of 14
No
No
1  
4 of 14
No
No
1  
3 of 14
No
No
3 of 14
No
No
Model Organism Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Rattus norvegicus (Norway rat) (15)
12 of 14
Yes
Yes
11 of 14
No
Yes
7 of 14
No
No
6 of 14
No
No
6 of 14
No
No
6 of 14
No
No
4 of 14
No
No
4 of 14
No
No
4 of 14
No
No
4 of 14
No
No
4 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
Mus musculus (laboratory mouse) (16)
13 of 14
Yes
Yes
11 of 14
No
Yes
7 of 14
No
No
7 of 14
No
No
7 of 14
No
No
6 of 14
No
No
6 of 14
No
No
5 of 14
No
No
5 of 14
No
No
4 of 14
No
No
4 of 14
No
No
4 of 14
No
No
3 of 14
No
No
3 of 14
No
No
2 of 14
No
No
1 of 14
No
Yes
Xenopus tropicalis (Western clawed frog) (19)
8 of 13
Yes
Yes
7 of 13
No
Yes
5 of 13
No
No
4 of 13
No
No
4 of 13
No
No
3 of 13
No
No
3 of 13
No
No
3 of 13
No
No
2 of 13
No
No
2 of 13
No
No
2 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
Danio rerio (Zebrafish) (17)
12 of 14
Yes
Yes
7 of 14
No
No
7 of 14
No
No
7 of 14
No
No
6 of 14
No
No
5 of 14
No
No
5 of 14
No
No
5 of 14
No
No
5 of 14
No
No
4 of 14
No
Yes
4 of 14
No
No
4 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
1 of 14
No
No
Caenorhabditis elegans (Nematode, roundworm) (6)
13 of 14
Yes
Yes
6 of 14
No
No
5 of 14
No
No
4 of 14
No
No
3 of 14
No
No
3 of 14
No
No
Anopheles gambiae (African malaria mosquito) (5)
12 of 12
Yes
Yes
Arabidopsis thaliana (thale-cress) (12)
12 of 13
Yes
Yes
12 of 13
Yes
Yes
12 of 13
Yes
Yes
12 of 13
Yes
Yes
12 of 13
Yes
Yes
12 of 13
Yes
Yes
12 of 13
Yes
Yes
12 of 13
Yes
Yes
12 of 13
Yes
Yes
10 of 13
No
Yes
6 of 13
No
No
5 of 13
No
Yes
Saccharomyces cerevisiae (Brewer's yeast) (5)
12 of 13
Yes
Yes
4 of 13
No
No
4 of 13
No
No
4 of 13
No
Yes
2 of 13
No
No
Schizosaccharomyces pombe (Fission yeast) (5)
11 of 12
Yes
Yes
4 of 12
No
No
4 of 12
No
No
4 of 12
No
Yes
2 of 12
No
No
Escherichia coli (enterobacterium) (0)
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:ATP8A. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (6)
9 of 13
6 of 13
6 of 13
5 of 13
4 of 13
1 of 13
Human Disease Associations
FlyBase Human Disease Model Reports
    Disease Ontology (DO) Annotations
    Models Based on Experimental Evidence ( 0 )
    Allele
    Disease
    Evidence
    References
    Potential Models Based on Orthology ( 1 )
    Modifiers Based on Experimental Evidence ( 2 )
    Disease Associations of Human Orthologs (via DIOPT v9.1 and OMIM)
    Note that ortholog calls supported by only 1 or 2 algorithms (DIOPT score < 3) are not shown.
    Homo sapiens (Human)
    Gene name
    Score
    OMIM
    OMIM Phenotype
    DO term
    Complementation?
    Transgene?
    Functional Complementation Data
    Functional complementation data is computed by FlyBase using a combination of the orthology data obtained from DIOPT and OrthoDB and the allele-level genetic interaction data curated from the literature.
    Interactions
    Summary of Physical Interactions
    Interaction Browsers
    Summary of Genetic Interactions
    Interaction Browsers

    Please look at the allele data for full details of the genetic interactions
    Starting gene(s)
    Interaction type
    Interacting gene(s)
    Reference
    Starting gene(s)
    Interaction type
    Interacting gene(s)
    Reference
    External Data
    Linkouts
    DroID - A comprehensive database of gene and protein interactions.
    MIST (protein-protein) - An integrated Molecular Interaction Database
    Pathways
    Signaling Pathways (FlyBase)
    Metabolic Pathways
    FlyBase
    External Links
    External Data
    Linkouts
    KEGG Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
    Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
    Class of Gene
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    2R
    Recombination map
    2-68
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    50A5-50A8
    Limits computationally determined from genome sequence between P{EP}DpEP358 and P{lacW}drkk13809&P{EP}mip120EP606
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    Experimentally Determined Recombination Data
    Location
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (15)
    Genomic Clones (32)
    cDNA Clones (45)
     

    Please Note This section lists cDNAs and ESTs that fall within the genomic extent of the gene model, which may include cDNAs and ESTs of genes within introns, or of overlapping genes. Please see JBrowse for alignment of the cDNAs and ESTs to the gene model.

    cDNA clones, fully sequenced
    BDGP DGC clones
    Other clones
    Drosophila Genomics Resource Center cDNA clones

    For each fully sequenced cDNA the DGRC maintains various forms of the cDNA (e.g tagged or untagged) in several different host vectors for subsequent cloning and expression in Drosophila and Drosophila cell lines.

    cDNA Clones, End Sequenced (ESTs)
    RNAi and Array Information
    Linkouts
    DRSC - Results frm RNAi screens
    Antibody Information
    Laboratory Generated Antibodies
     
    Commercially Available Antibodies
     
    Cell Line Information
    Publicly Available Cell Lines
     
      Other Stable Cell Lines
       
        Other Comments

        New annotation (CG30061) in release 3 of the genome annotation.

        Relationship to Other Genes
        Source for database merge of

        Source for merge of: CG17034 CG30061

        Source for merge of: CG17034 anon-WO0153538.54

        Additional comments

        Annotations CG17034 and CG30061 merged as CG42321 in release 5.9 of the genome annotation.

        Source for merge of CG17034 anon-WO0153538.54 was sequence comparison ( date:051113 ).

        Nomenclature History
        Source for database identify of

        Source for identity of: ATP8A CG42321

        Nomenclature comments
        Etymology
        Synonyms and Secondary IDs (8)
        Datasets (0)
        Study focus (0)
        Experimental Role
        Project
        Project Type
        Title
        Study result (0)
        Result
        Result Type
        Title
        External Crossreferences and Linkouts ( 109 )
        Sequence Crossreferences
        NCBI Gene - Gene integrates information from a wide range of species. A record may include nomenclature, Reference Sequences (RefSeqs), maps, pathways, variations, phenotypes, and links to genome-, phenotype-, and locus-specific resources worldwide.
        GenBank Nucleotide - A collection of sequences from several sources, including GenBank, RefSeq, TPA, and PDB.
        GenBank Protein - A collection of sequences from several sources, including translations from annotated coding regions in GenBank, RefSeq and TPA, as well as records from SwissProt, PIR, PRF, and PDB.
        UniProt/GCRP - The gene-centric reference proteome (GCRP) provides a 1:1 mapping between genes and UniProt accessions in which a single 'canonical' isoform represents the product(s) of each protein-coding gene.
        UniProt/TrEMBL - Automatically annotated and unreviewed records of protein sequence and functional information
        Other crossreferences
        AlphaFold DB - AlphaFold provides open access to protein structure predictions for the human proteome and other key proteins of interest, to accelerate scientific research.
        BDGP expression data - Patterns of gene expression in Drosophila embryogenesis
        DRscDB - A single-cell RNA-seq resource for data mining and data comparison across species
        EMBL-EBI Single Cell Expression Atlas - Single cell expression across species
        FlyAtlas2 - A Drosophila melanogaster expression atlas with RNA-Seq, miRNA-Seq and sex-specific data
        KEGG Genes - Molecular building blocks of life in the genomic space.
        MARRVEL_MODEL - MARRVEL (model organism gene)
        Linkouts
        Drosophila Genomics Resource Center - Drosophila Genomics Resource Center (DGRC) cDNA clones
        DroID - A comprehensive database of gene and protein interactions.
        DRSC - Results frm RNAi screens
        Eukaryotic Promoter Database - A collection of databases of experimentally validated promoters for selected model organisms.
        FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
        FlyCyc Genes - Genes from a BioCyc PGDB for Dmel
        Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
        Flygut - An atlas of the Drosophila adult midgut
        FlyMet - A comprehensive tissue-specific metabolomics resource for Drosophila.
        iBeetle-Base - RNAi phenotypes in the red flour beetle (Tribolium castaneum)
        KEGG Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
        MIST (protein-protein) - An integrated Molecular Interaction Database
        Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
        References (62)